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Chimney Repair in Park Slope, Brooklyn

Serving Park Slope and nearby cities.

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The short answer

Most chimney repairs in Park Slope involve worn mortar joints, cracked crowns, leaking flashing, damaged flue liners, and liner work after an oil-to-gas boiler conversion. Our certified technicians inspect the chimney first, explain what we find in plain terms, and repair the masonry and flue so your fireplace or heating system vents safely.

Park Slope is full of brownstones, brick rowhouses, and pre-war apartment buildings, and many of them still rely on chimneys that have been venting fireplaces and boilers for generations. Brick, mortar, and flue tiles don't last forever, especially through New York winters. All Star Chimney Sweep is based in Brooklyn, about a mile from Park Slope, and our certified technicians repair chimneys throughout the 11217 area. We start with an inspection, show you what we find, and fix the problems that affect safety and weather protection.

Common Chimney Problems in Park Slope Homes

Older brick chimneys in rowhouses and brownstones tend to wear in predictable ways. Rooftop chimney stacks take the most weather, so that's usually where damage shows up first. Water is the main enemy. Once it gets into brick and mortar, freeze-and-thaw cycles widen small cracks a little more every winter.

Because Park Slope rowhouses often share walls and rooflines, a chimney problem can affect more than one room or even a neighbor's side. Catching it early keeps a small repair from becoming a larger rebuild.

  • Crumbling or missing mortar joints (repointing needed)
  • Cracked or deteriorated chimney crowns that let water into the stack
  • Spalling brick, where the face of the brick flakes or pops off
  • Failed flashing where the chimney meets the roof, causing leaks into top-floor rooms
  • Cracked, shifted, or missing clay flue tiles
  • Missing or rusted chimney caps that let in rain, debris, and animals
Chimney Repair at a home

Oil-to-Gas Conversions and Chimney Liners

Many Park Slope buildings have switched their boilers from oil to gas. When a New York City building makes that conversion, the chimney has to be evaluated as part of the work. A new liner is often needed because gas exhaust produces acidic condensate that can corrode an unlined or clay-lined masonry flue over time.

If your building has converted, or you're planning a conversion, we can inspect the flue and tell you whether it's suitable for the new appliance. When a liner is needed, we size and install one that matches the equipment it serves, so exhaust leaves the building the way it should.

How We Approach a Repair

Every repair starts with an inspection. The NFPA 211 standard calls for chimneys, fireplaces, and vents to be inspected once a year. It describes three levels: Level 1 when nothing has changed, Level 2 when the system changes (such as a new appliance or a switch of fuel) or the home is sold, and Level 3 when a hidden hazard has to be reached by opening part of the chimney or building.

For most repair calls, we look at the stack from the roof, check the flue with a camera, and examine the firebox and damper. Then we explain what we found, what needs attention now, and what can wait. You decide how to proceed before any work begins.

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Timing Your Repair Around Heat Season

New York City's heat season runs from October 1 through May 31. During those months, building owners must keep apartments heated to the city's minimum temperatures. If your boiler vents through a chimney that needs work, it's far easier to schedule repairs in late spring or summer than to deal with a flue problem once the heat has to stay on.

Masonry work such as repointing and crown repair also goes best in mild, dry weather. Mortar cures more reliably when it isn't freezing. If you've noticed a leak, loose brick, or a damper that won't seal, the warmer months are a good time to have it looked at.

Serving Park Slope and Nearby Neighborhoods

We work on single-family brownstones, multi-unit rowhouses, and pre-war apartment buildings across Park Slope. We also handle chimney repair in nearby Prospect Heights, Carroll Gardens, Cobble Hill, Gowanus, and Red Hook, where much of the housing stock is similar. If you're unsure whether your chimney needs repair or just a cleaning and inspection, we can start with an inspection and go from there.

More services in Park Slope

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Chimney sweep cleaning a brick chimney on a rowhouse roof

Book Chimney Repair in Park Slope

Serving Park Slope and nearby cities.

  • Diagnosis before any repair
  • Written price up front
  • Written price before we start
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What to expect

How a visit goes

  1. We show you what we see

    Every inspection comes with photos of the flue, crown, damper or vent, so you can see the condition for yourself instead of taking our word for it.

  2. We explain your options

    When there is more than one reasonable fix, we lay out each option, what it addresses, and what happens if you wait, so you can decide what fits your home.

  3. We respect your home

    We lay down drop cloths, use sealed equipment to contain soot and dust, and leave the work area as clean as we found it.

FAQ

Common questions

Don’t see your question? Call (804) 963-6010 and we’ll talk it through.

How do I know if my chimney needs repair?

Common signs include water stains near the chimney on upper floors, bits of brick or mortar on the roof or in the firebox, white staining on the brick, a damper that sticks, or a smoky smell. An inspection will confirm what's going on.

Does my chimney need a new liner after converting from oil to gas?

Often, yes. In New York City the chimney has to be evaluated during an oil-to-gas conversion, and a new liner is frequently needed because gas exhaust creates acidic condensate that can damage a masonry flue.

What is repointing?

Repointing means removing worn, crumbling mortar from between the bricks and replacing it with fresh mortar. It restores the chimney's ability to shed water and keeps bricks from loosening.

How often should my chimney be inspected?

The NFPA 211 standard calls for a yearly inspection of chimneys, fireplaces, and vents. A more detailed inspection is recommended when you change appliances or fuel, or when the home is sold.

Can you repair a chimney on a shared rowhouse roof?

Yes. Many Park Slope rowhouses have chimneys near shared rooflines. We'll inspect the stack, explain what we find, and let you know if the issue may also involve an adjoining property.

When is the best time to schedule chimney repair?

Late spring through early fall is usually best. Masonry cures better in mild weather, and finishing work before heat season starts on October 1 keeps your heating system available when you need it.

Find out what's going on in your chimney

Tell us what you're noticing, whether it's smoke, odors, leaks or a slow dryer, and we'll set up a visit. You'll get photos of what we find and a written price before any work begins.

Request Service Call (804) 963-6010
Call (804) 963-6010 Request Service